[PATCH 1/3] media: meson: vdec: enable mcrcc for VP9

[Neil Armstrong]

From: Maxime Jourdan <mjour...@baylibre.com>

The motion compensation reference cache controller allows caching
parts of reference frames for faster decoding.

Fixes: 00c43088aa68 ("media: meson: vdec: add VP9 decoder support")
Signed-off-by: Maxime Jourdan <mjour...@baylibre.com>
Signed-off-by: Neil Armstrong <narmstr...@baylibre.com>
---
 drivers/staging/media/meson/vdec/codec_vp9.c | 31 ++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/drivers/staging/media/meson/vdec/codec_vp9.c 
b/drivers/staging/media/meson/vdec/codec_vp9.c
index 60e4fc0052b3..897f5d7a6aad 100644
--- a/drivers/staging/media/meson/vdec/codec_vp9.c
+++ b/drivers/staging/media/meson/vdec/codec_vp9.c
@@ -854,6 +854,36 @@ static int codec_vp9_stop(struct amvdec_session *sess)
        return 0;
 }
 
+/*
+ * Program LAST & GOLDEN frames into the motion compensation reference cache
+ * controller
+ */
+static void codec_vp9_set_mcrcc(struct amvdec_session *sess)
+{
+       struct amvdec_core *core = sess->core;
+       struct codec_vp9 *vp9 = sess->priv;
+       u32 val;
+
+       /* Reset mcrcc */
+       amvdec_write_dos(core, HEVCD_MCRCC_CTL1, 0x2);
+       /* Disable on I-frame */
+       if (vp9->cur_frame->type == KEY_FRAME || vp9->cur_frame->intra_only) {
+               amvdec_write_dos(core, HEVCD_MCRCC_CTL1, 0x0);
+               return;
+       }
+
+       amvdec_write_dos(core, HEVCD_MPP_ANC_CANVAS_ACCCONFIG_ADDR, BIT(1));
+       val = amvdec_read_dos(core, HEVCD_MPP_ANC_CANVAS_DATA_ADDR) & 0xffff;
+       val |= (val << 16);
+       amvdec_write_dos(core, HEVCD_MCRCC_CTL2, val);
+       val = amvdec_read_dos(core, HEVCD_MPP_ANC_CANVAS_DATA_ADDR) & 0xffff;
+       val |= (val << 16);
+       amvdec_write_dos(core, HEVCD_MCRCC_CTL3, val);
+
+       /* Enable mcrcc progressive-mode */
+       amvdec_write_dos(core, HEVCD_MCRCC_CTL1, 0xff0);
+}
+
 static void codec_vp9_set_sao(struct amvdec_session *sess,
                              struct vb2_buffer *vb)
 {
@@ -1267,6 +1297,7 @@ static void codec_vp9_process_frame(struct amvdec_session 
*sess)
 
        amvdec_write_dos(core, HEVC_PARSER_PICTURE_SIZE,
                         (vp9->height << 16) | vp9->width);
+       codec_vp9_set_mcrcc(sess);
        codec_vp9_set_sao(sess, &vp9->cur_frame->vbuf->vb2_buf);
 
        vp9_loop_filter_frame_init(core, &vp9->seg_4lf,
-- 
2.22.0